M1363 HCPCS: Reimbursement & Policy Benchmarks | OpenPayer

Summary & Overview

HCPCS Level II M1363: Missed Follow-Up Assessment Within 120 Days

HCPCS Level II code M1363 indicates patients who did not receive a required follow-up assessment within 120 days of an index assessment. Nationally, this code matters as a quality and compliance indicator across post-acute, home health, and other outpatient assessment-driven services; it flags gaps in continuity of care that can affect outcomes and program reporting. Key payers relevant to analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will learn what M1363 represents, why timely follow-up assessments are monitored, and how the code is used in benchmarking and payer reporting. The publication provides an overview of standard use cases, common modifiers, and practical coding context for billing and quality teams. It also outlines the types of benchmarks and policy updates that typically influence use of the code, and the clinical settings where missed follow-up assessments are most relevant. Where input data is missing, the publication notes that specific taxonomies, related ICD-10 diagnoses, and service-line details are not available in the input.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareM1363HCPCS Level IIfollow-up assessmentquality measurehome healthoutpatient assessmentcare continuityassessment timingpost-acute care

Billing Code Overview

HCPCS Level II code M1363 denotes patients who did not have a follow-up assessment within 120 days of the index assessment. This code captures a lapse in the expected follow-up assessment timeline after an initial or index assessment.

Service type: Quality/compliance tracking related to follow-up assessment timing
Typical site of service: Outpatient or community-based care settings where periodic assessments are performed, such as home health, outpatient clinics, or long-term services and supports programs

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A patient completed an initial functional assessment for durable medical equipment (DME) needs, mobility device provision, or rehabilitation services but did not return for the required follow-up within 120 days. Typical patient: an adult with new or worsening mobility impairment from stroke, spinal cord injury, multiple sclerosis, or severe osteoarthritis who received an index assessment documenting need for device fitting, therapy plan, or outcome reassessment. The clinical workflow begins with the index assessment performed by a qualified clinician (physical therapist, occupational therapist, physiatrist, or DME supplier clinician), documentation of a follow-up interval (often 30–90 days) and plan, and scheduling of a follow-up visit within 120 days. When the patient fails to attend or cannot be reached and no follow-up assessment occurs within 120 days, billing of M1363 documents that a required follow-up assessment was not completed. Typical site of service includes outpatient rehabilitation clinics, DME supplier facilities, home health visits, or outpatient physician offices where initial assessments and planned reassessments occur. Clinical implications include inability to verify device fit, functional progress, and safety, and administrative follow-up for outreach and potential care coordination is expected but not part of this code description.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services

HCPCS M1151: Heart Transplant Status or LVAD Support

HCPCS-M1258-CVD-RISK-ASSESSMENT-DOCUMENTED-RISK-SCORE

HCPCS Level II M1258: Cardiovascular Risk Assessment, Documented Risk Score

HCPCS-M1403-PROMIS-BASELINE-AND-FOLLOW-UP-SURVEYS

HCPCS M1403: PROMIS Baseline and Follow-Up Survey Documentation

HCPCS-M1158-HISTORY-IMMUNOCOMPROMISING-CONDITIONS

HCPCS M1158: History of Immunocompromising Conditions

HCPCS-M1253-AMBULATORY-PALLIATIVE-CARE-PATIENT-DISAVOWAL

HCPCS M1253: Ambulatory Palliative Care Patient Disavowal

HCPCS-M1182-IBD-INELIGIBILITY-PRE-EXISTING-INFLAMMATORY-BOWEL-DISEASE

HCPCS M1182: Ineligibility Due to Pre-existing Inflammatory Bowel Disease

HCPCS-M1251-PROXY-COMPLETED-HEALTH-SURVEY

HCPCS Level II M1251: Proxy-Completed Patient Health Survey

HCPCS-M1440-TELEHEALTH-ENCOUNTER-VIRTUAL-VISIT

HCPCS M1440: Telehealth Encounter

HCPCS-M1254-PATIENT-DECEASED-ON-HOME-HEALTH-SURVEY-CONTACT

HCPCS Level II M1254: Patient Deceased on Home Health Survey Contact

HCPCS-M1398-PROMIS-BASELINE-FOLLOW-UP-SURVEYS

HCPCS Level II M1398: PROMIS Baseline and Follow-up Survey Documentation

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Taxonomy Code	Specialty	Notes
`175H00000X`	Physical Therapist	Performs initial and follow-up functional assessments for mobility and DME needs.
`261QE0000X`	Occupational Therapist	Conducts ADL-focused assessments and device fitting follow-ups.
`2084P0800X`	Physical Medicine & Rehabilitation Physician (Physiatry)	Oversees rehabilitation plans, orders DME, and interprets assessment findings.
`332B00000X`	Durable Medical Equipment Supplier	Provides device fitting and may document follow-up attempts and fittings.
`341600000X`	Home Health Agency	Provides assessments and follow-ups in the home setting when applicable.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G81.90`	Hemiplegia, unspecified affecting unspecified side	Common after stroke; patients require reassessment for mobility devices and rehab progress.
`G82.50`	Paraplegia, unspecified	Patients with spinal cord injury need regular follow-up for seating, mobility, and pressure management.
`M16.9`	Osteoarthritis of hip, unspecified	Progressive joint disease leading to mobility impairment and need for assistive devices and reassessment.
`M17.9`	Osteoarthritis of knee, unspecified	Knee OA often prompts DME, braces, or therapy with scheduled reassessments.
`G35`	Multiple sclerosis	Chronic neurodegenerative disease requiring periodic reassessment of function and equipment needs.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97161`	Physical therapy evaluation, low complexity	Initial PT evaluation often performed at the index assessment before planning follow-up; documents baseline function.
`97162`	Physical therapy evaluation, moderate complexity	Used when initial assessment documents multiple comorbidities or moderate complexity goals that require scheduled reassessment.
`97110`	Therapeutic exercises	Commonly performed before or between assessments to improve strength and mobility; lack of follow-up may halt ongoing therapy.
`97530`	Therapeutic activities	Functional task-based therapy that may be initiated at index visit and requires reassessment for progression or DME adjustment.
`97760`	Orthotic management and training	Initial fitting and training for orthoses with planned follow-up to assess fit; failure to follow-up can be reported with `M1363`.

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